What is World Earth Day? Why is it celebrated?

Essay​

When volcanoes erupt, magma (hot, molten rock) rises toward the surface of the earth. as magma cools, solid rock forms. this rock contains substances from the interior of the earth. which of the following natural resources is likely to be plentiful near subduction zones where volcanic activity has occurred in the past?

What is the border between layers a through f and layer g called?

The picture above depicts the berlin wall which divided in half from the 1960 to 1989 which type of boundary was the berlin wall